1 0 0 0 高松塚古墳壁画の黒色顔料の微細構造
- 著者
- 北田 正弘 高妻 洋成 肥塚 隆保 建石 徹
- 出版者
- 公益社団法人 日本金属学会
- 雑誌
- 日本金属学会誌 (ISSN:00214876)
- 巻号頁・発行日
- vol.79, no.2, pp.71-75, 2015
- 被引用文献数
- 6
The mural of the <i>Takamatsuzuka</i> tumulus in Asuka, Nara prefecture, was painted in the 7-8th centuries. Red, green, blue, yellow, and black pigments are used in the mural. The microstructure of one of them, the red pigment, was described in the previous paper. In this study, the black pigment observed within the red pigment area has been investigated. An optical microscope, a scanning electron microscope, and a transmission electron microscope are utilized to examine the microstructure. Among the black particles, two different Fe compounds are observed. One is magnetite (Fe<sub>3</sub>O<sub>4</sub>) comprising small amounts of Ti, Al, and Mg, and the other is ilmenite (FeTiO<sub>3</sub>) containing a small amount of Mg. In addition to the above compounds, an oxide particle containing Zr is also observed.<br>
1 0 0 0 OA 高松塚古墳石室の目地漆喰表面汚染層の微細構造
- 著者
- 北田 正弘 高妻 洋成 建石 徹
- 出版者
- 公益社団法人 日本金属学会
- 雑誌
- 日本金属学会誌 (ISSN:00214876)
- 巻号頁・発行日
- vol.79, no.8, pp.404-412, 2015 (Released:2015-08-01)
- 参考文献数
- 15
- 被引用文献数
- 2 4
The Takamatsuzuka tumulus was constructed in the 7th to 8th centuries at Asuka in Nara prefecture. The mural and wall surfaces are soiled and deteriorated by rainwater, mold, and other causes. The mural is painted on the stone wall that is coated with stucco. The stone walls are jointed with masonry joint stucco. The purpose of this investigation is to clarify the composition, crystal structure, and other material factors of the surface contaminant layer on the joint stucco. An X-ray computer tomography, an X-ray diffractometer, a scanning electron microscope, and a transmission electron microscope are utilized to examine the microstructure. The contaminant layer thickness is 0.2-0.3 mm. Kaolinite, muscovite, montmorillonite, hematite and a few silicates are detected from the contaminant layer. The compounds detected are constituents of soil-like clay, and most of them contain Fe. By transmission electron microscopy observation, the contaminant layer is found to consist of fine mineral grains, as mentioned above, most of which are acicular. The acicular grain size is approximately 0.2-1 μm in length and 0.015-0.2 μm in width. The grains are in a row parallel to the layer surface. The hematite grains are circular with diameters of 15-250 nm. In addition, iron titanate is observed. The yellowish brown color of the stucco surface is mainly due to iron ions contained in the above-mentioned compounds. It is thought that the grains deposited on the stucco surface from colloidal-like water containing the above-mentioned fine grains.